code: def big_tokenizer(self):
      return BertGenerationTokenizer.from_pretrained(
          "google/bert_for_seq_generation_L-24_bbc_encoder"
      )
  
file_path: transformers/tests/models/bert_generation/test_tokenization_bert_generation.py
imports: import unittest
  from transformers import BertGenerationTokenizer
  from transformers.testing_utils import get_tests_dir, require_sentencepiece, require_torch, slow
  from transformers.utils import cached_property
  from ...test_tokenization_common import TokenizerTesterMixin
label_desc: Use image node_id 6 for calling the BertGenerationTokenizationTest obj's underlying member method code with example usage: obj.big_tokenizer() and returns: BertGenerationTokenizer